Piezoelectric assembly, electronic device and assembly process for piezoelectric assembly

Abstract

A piezoelectric assembly includes at least two piezoelectric components, a positive circuit board, and a negative circuit board. Each piezoelectric component includes a main body portion and a connecting portion. Respective first surfaces of the main body portion and the connecting portion are a positive electrode, and respective second surfaces of the main body portion and the connecting portion are a negative electrode. Main body portions of the at least two piezoelectric components are stacked, connecting portions of the at least two piezoelectric components are distributed in a staggered manner along a set edge. The positive circuit board is coupled to the first surface of the connecting portion, and the negative circuit board is coupled to the second surface of the connecting portion.

What is claimed is: 
     
       1. A piezoelectric assembly, comprising:
 at least two piezoelectric components, each of the at least two piezoelectric components comprising:
 a main body portion having a set edge, a first surface, and a second surface opposite the first surface, main body portions of the at least two piezoelectric components being stacked, and 
 a connecting portion protruding from the set edge and having a first surface and a second surface opposite the first surface, the first surface of the main body portion and the first surface of the connecting portion being a positive electrode, the second surface of the main body portion and the second surface of the connecting portion being a negative electrode, first surfaces of connecting portions of the at least two piezoelectric components face a same direction, and the connecting portions of the at least two piezoelectric components being staggered along the set edge; 
 
 a positive circuit board coupled to the first surface of the connecting portion; and 
 a negative circuit board coupled to the second surface of the connecting portion. 
 
     
     
       2. The piezoelectric assembly according to  claim 1 , wherein the connecting portion comprises:
 a bearing section having a first surface as the positive electrode and a second surface as the negative electrode; and 
 a bending section coupled to the bearing section, 
 wherein a bending direction of the bending section causes bearing sections of the at least two piezoelectric components to approach each other in a thickness direction of the connecting portions of the at least two piezoelectric components. 
 
     
     
       3. The piezoelectric assembly according to  claim 2 , wherein in any two piezoelectric components of the at least two piezoelectric components, a distance between first surfaces of the bearing sections is less than or equal to a set threshold. 
     
     
       4. The piezoelectric assembly according to  claim 2 , wherein the at least two piezoelectric components comprise a first piezoelectric component and a second piezoelectric component;
 a bending section of the first piezoelectric component comprises a first bending section, a bearing section of the first piezoelectric component comprises a first bearing section, and the first bending section and the first bearing section are connected sequentially from the set edge; 
 a bending section of the second piezoelectric component comprises a second bending section, a bearing section of the second piezoelectric component comprises a second bearing section, and the second bending section and the second bearing section are connected sequentially from the set edge; and 
 the first bending section and the second bending section are bent in opposite directions, and a distance between a first surface of the first bearing section and a first surface of the second bearing section is less than or equal to a set threshold. 
 
     
     
       5. The piezoelectric assembly according to  claim 4 , wherein the first bearing section and the second bearing section are coupled to the positive circuit board and the negative circuit board; or
 the first bearing section and the second bearing section are coupled to one of the positive circuit board and the negative circuit board. 
 
     
     
       6. The piezoelectric assembly according to  claim 5 , wherein the bending section of the first piezoelectric component comprises a third bending section, the bearing section of the first piezoelectric component further comprises a third bearing section, and the third bending section and the third bearing section are connected sequentially from an end of the first bearing section away from the first bending section;
 the bending section of the second piezoelectric component comprises a fourth bending section, the bearing section of the second piezoelectric component comprises a fourth bearing section, and the fourth bending section and the fourth bearing section are connected sequentially from an end of the second bearing section away from the second bending section; 
 the third bending section and the fourth bending section are bent in a same direction; and 
 the first bearing section and the second bearing section are configured to couple one of the positive circuit board and the negative circuit board, and the third bearing section and the fourth bearing section are configured to couple the other of the positive circuit board and the negative circuit board. 
 
     
     
       7. The piezoelectric assembly according to  claim 2 , wherein the at least two piezoelectric components comprise a third piezoelectric component and a fourth piezoelectric component;
 a bearing section of the third piezoelectric component comprises a fifth bearing section coupled to the set edge; 
 a bending section of the fourth piezoelectric component comprises a fifth bending section, a bearing section of the fourth piezoelectric component comprises a sixth bearing section, and the fifth bending section and the sixth bearing section are connected sequentially from the set edge; and 
 a bending direction of the fifth bending section is configured in such a way that a distance between a first surface of the sixth bearing section and a first surface of the fifth bearing section is less than or equal to a set threshold; and the fifth bearing section and the sixth bearing section are coupled to the positive circuit board or the negative circuit board. 
 
     
     
       8. The piezoelectric assembly according to  claim 7 , wherein the bending section of the third piezoelectric component further comprises a sixth bending section, the bearing section of the third piezoelectric component further comprises a seventh bearing section, and the sixth bending section and the seventh bearing section are connected sequentially from an end of the fifth bearing section away from the set edge;
 the bending section of the fourth piezoelectric component further comprises a seventh bending section, the bearing section of the fourth piezoelectric component further comprises an eighth bearing section, and the seventh bending section and the eighth bearing section are connected sequentially from an end of the sixth bearing section away from the fifth bending section; and 
 the sixth bending section and the seventh bending section are bent in a same direction, and the seventh bearing section and the eighth bearing section are coupled to the positive circuit board or the negative circuit board. 
 
     
     
       9. The piezoelectric assembly according to  claim 1 , wherein along an extension direction of the connecting portion, the positive circuit board and the negative circuit board are arranged in a staggered manner. 
     
     
       10. The piezoelectric assembly according to  claim 1 , wherein the piezoelectric component comprises a first main body portion and a second main body portion, and two ends of the connecting portion are connected to the first main body portion and the second main body portion respectively. 
     
     
       11. An electronic device, comprising:
 a display screen having a back surface facing an inside of the electronic device; and 
 a piezoelectric assembly coupled to the back surface and comprising:
 at least two piezoelectric components, each of the at least two piezoelectric components comprising:
 a main body portion having a set edge, a first surface, and a second surface opposite the first surface, main body portions of the at least two piezoelectric components being stacked, and 
 a connecting portion extending from the set edge in a direction away from the main body portion and having a first surface and a second surface opposite the first surface, the first surface of the main body portion and the first surface of the connecting portion being a positive electrode, the second surface of the main body portion and the second surface of the connecting portion being a negative electrode, first surfaces of connecting portions of the at least two piezoelectric components face a same direction, and the connecting portions of the at least two piezoelectric components being spaced apart along the set edge; 
 
 a positive circuit board arranged on the first surface of the connecting portion; and 
 a negative circuit board arranged on the second surface of the connecting portion. 
 
 
     
     
       12. The electronic device according to  claim 11 , further comprising a middle frame, configured to fix the display screen, and the piezoelectric assembly is attached to the middle frame. 
     
     
       13. An assembly process for a piezoelectric assembly, comprising:
 providing at least two piezoelectric components, wherein each of the at least two piezoelectric components comprises a main body portion and a connecting portion protruding from a set edge of the main body portion; a first surface of the main body portion and a first surface of the connecting portion are a positive electrode, and a second surface of the main body portion and a second surface of the connecting portion are a negative electrode; the first surfaces are opposite to the second surfaces; 
 stacking main body portions of the at least two piezoelectric components to cause a first surface of one piezoelectric component of the at least two piezoelectric components to face a second surface of another piezoelectric component of the at least two piezoelectric components, and connecting portions of the at least two piezoelectric components are staggered along the set edge; and 
 coupling the first surface of the connecting portion to a positive circuit board and coupling the second surface of the connecting portion to a negative circuit board, wherein different connecting portions are coupled at different positions of the positive circuit board, and different connecting portions are coupled at different positions of the negative circuit board. 
 
     
     
       14. The assembly process according to  claim 13 , wherein before the coupling the first surface of the connecting portion to a positive circuit board and coupling the second surface of the connecting portion to a negative circuit board, the assembly process further comprises:
 bending the connecting portion to cause a distance between the first surfaces of the connecting portions of any two piezoelectric components of the at least two piezoelectric components after bending to be less than or equal to a set threshold. 
 
     
     
       15. The assembly process according to  claim 14 , wherein the at least two piezoelectric components comprise a first piezoelectric component and a second piezoelectric component;
 the bending the connecting portion comprises: bending a connecting portion of the first piezoelectric component and a connecting portion of the second piezoelectric component in opposite directions for a first time, to cause a distance between a first surface of the connecting portion of the first piezoelectric component and a first surface of the connecting portion of the second piezoelectric component to be less than or equal to the set threshold. 
 
     
     
       16. The assembly process according to  claim 15 , wherein the coupling the first surface of the connecting portion to a positive circuit board and coupling the second surface of the connecting portion to a negative circuit board comprises:
 after the bending for the first time, coupling the first surface of the connecting portion of the first piezoelectric component and the first surface of the connecting portion of the second piezoelectric component to the positive circuit board, and coupling a second surface of the connecting portion of the first piezoelectric component and a second surface of the connecting portion of the second piezoelectric component to the negative circuit board. 
 
     
     
       17. The assembly process according to  claim 15 , wherein the coupling the first surface of the connecting portion to a positive circuit board and coupling the second surface of the connecting portion to a negative circuit board comprises:
 after the bending for the first time, coupling the connecting portion of the first piezoelectric component and the connecting portion of the second piezoelectric component to one of the positive circuit board and the negative circuit board; 
 bending the connecting portion of the first piezoelectric component and the connecting portion of the second piezoelectric component in a same direction for a second time; 
 after the bending for the second time, coupling the connecting portion of the first piezoelectric component and the connecting portion of the second piezoelectric component to the other of the positive circuit board and the negative circuit board. 
 
     
     
       18. The assembly process according to  claim 14 , wherein the at least two piezoelectric components comprise a third piezoelectric component and a fourth piezoelectric component;
 the bending the connecting portion comprises: bending a connecting portion of the fourth piezoelectric component for a first time, to cause a distance between a first surface of the connecting portion of the fourth piezoelectric component and a first surface of a connecting portion of the third piezoelectric component to be less than or equal to a set threshold. 
 
     
     
       19. The assembly process according to  claim 18 , wherein the coupling the first surface of the connecting portion to a positive circuit board and coupling the second surface of the connecting portion to a negative circuit board comprises:
 after the bending for the first time, coupling the connecting portion of the third piezoelectric component and the connecting portion of the fourth piezoelectric component to one of the positive circuit board and the negative circuit board; 
 bending the connecting portion of the third piezoelectric component and the connecting portion of the fourth piezoelectric component in a same direction for a second time; 
 after the bending for the second time, coupling the connecting portion of the third piezoelectric component and the connecting portion of the fourth piezoelectric component to the other of the positive circuit board and the negative circuit board. 
 
     
     
       20. The assembly process according to  claim 13 , wherein along an extension direction of the connecting portion, a junction position between the positive circuit board and the first surface and a junction position between the negative circuit board and the second surface are staggered.